package chapter04.exam15;

import javax.swing.plaf.PanelUI;

//定义类Animal
class Animal{
    public void shout(){
        System.out.println("喵喵......");
    }
}
//Dog类
class Dog extends Animal{
    //重写shout（）方法
    public void shout(){
        System.out.println("汪汪......");
    }
    public void eat(){
        System.out.println("吃骨头......");
    }
}
//定义测试类
public class exam15 {
    public static void main(String[] args) {
        Dog dog = new Dog();//创建Dog对象
        Animal an = dog;
        an.shout();
    }
}
